The Study On The Productivity Evaluation And Potential Of Low-Permeability Gas Reservoir In Sulige South Region

In recent years,with the develepment of the demand of oil and gas of the whole world,the exploration and production of low-permeability gas reservoir has earned wide-spread respect.So,it is an important guarantee for the sustainable,effective,and coordinated development of the natural gas industry to putforward some cogent adjustment measures on the development characteristics of low-permeability gas reservoir andachieveits effective development.The Sulige Gasfield in Ordos Basin,is typically tight sandstone gas reservoir with large area and low abundance,which is found in recent years with the largest reserve in China.The south region of the Sulige Gasfield,is an important gas field.With the exploration and development of it,the mission of the gas-production is increasing.Butthere appears some problemsduring the developmentsuch as that the gas wells' productivity is low,the pressure decreases rapidly,the production declines rapidly,the rate-maintenance capability is bad and so on.It is the needpress for the current producing to realize the stable production of this eare.With the study area's exploration and development data at the beginning time,the paper, analysis the productivity characteristics,the influencing factors and the stable production potential,select test area to make n?mericalsimulation and make rational adjustment of development plan to improve the development effect of the low permeability gas reservoir.In this paper,the achieved accomplishments and the futher understandings are as followed:1.Through the study of the study area's geological characteristics,we know that the physical property of the reservoi is so bad,the reservoir heterogeneity is severe,the reservoir communication is bad and with low abundance,low porosity and low permeability.2.Through the study onthe methods of productivity evaluation and decreasing analysis of the low permeability gas reservoir and make productivity evaluation and study the production decline on the study area,we find that the wells' productivity is generally low,the production declines fast and stabilizing performance is bad.3.Th reasons of the low development effect includes geology and exploitation.4.Through the classify and evaluation on the development potential of the wells,we find that the c?mulative production of the wells priority to low-production by prediction on the decline rule,the gas reservoir' producing different on different subzones.Make rational proportion and determine the rational production capacity.5.Study the measures for stable production by gas reservoir engineering and gas n?merical simulation technology includinglayer series of development division,determine the wells andhorizons for reperforating,perfecting the well pattern,determine rational gas production rate and making turbo-charged mining and fracturing technology optimization.